Inking mechanism of platen printing presses



Jan. 14, 1930. M. HORA 1,743,920

INKING MECHANISM OFV PLATEN PRINTING PRESSES Original Filed July le.. 1927 y" "lill/111111,14 l

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Patented Jan. 14, 1930 UNITED STATES PATENT OFFICE i N.

MAX HORA, E DUssELnoEE-OBERKAssEL, GERMANY, Assreivoa 'ro THE rrims/LEISEN- WERK UND MASCHINENBAU AKTIENGESELLSCHAFT, 0E DUSSELDORF-HEERE@ GERMANY INKING- MECHANISM OF PLATEN PRINTING PRESSES Original application led July 18, 1927, Serial No. 206,704, and in Germany Angnst'3, 1926. Divided and this application filed August 8, 1928. Serial No. 298,368. y

This invention relates to improvements in the inking mechanism of platen printing p tion.

presses and has for its object to cause' the carrier of the distributing rollers, the socalled roller carriage, to remain stationary for a rather long interval in its highest position, in which the distributing rollers touch the y inking cylinder of the inking mechanism. I provide a device which in an exceedingly simple manner occasions a complete stoppage of the distributing roller carriage. The weight of the distributing roller carriage is in this case counterbalanced by a torsion spring, which has great advantages over the counterweights, or tension, or compression springs otherwise employed for the same purpose.

The invention is illustrated by way of example in the accompanying drawings, wherein Figure 1 is ax side elevation of the controlling device for the roller carriage,

Figure 2 a front elevation thereof,

Figure 3 a side elevation of a detail of this device,

Figure 1 the same device in anotherposition, and

Figure 5 a front elevation of this device.

Upon a shaft 1 are arranged in the usual way two hoek-shaped levers 2, which are connected by link rods 3 with the roller carriage 4. A stressed spring 5 tending to cause rotation serves to counterbalance the weight of the roller carriage, in the uppermost position. The supplementary stress, which the spring 5 experiences, when the roller carriage 4; descends, is approximately counterbalanced by the resulting deflection of the levers 2. VThe adjusting of the spring 5 is eifected by means of a nut 6, which can be adjusted and locked in its adjusted posi- The drive is effected by means of a crank pin 7, which is mounted upon a toothed wheel 8 and which by means of a linkelike connecting rod 9 acts upon an arm 10 of the shaft 1. Upon the crank pin 7 is mounted a slide block 11, which is slidable in a slot 12 in the rod 9. Upon the toothed wheel 8 is fitted a double cam disc 13, which surrounds the crank pin 7, and which is provided onthe periphery with a raised rim 14, the internal and external curves of which are however not parallel to one another but run somewhat differently. To the lever 9 are fitted two guiding rollers 15 and 16, the former of which runs uponthe inside of the rim 14, and the latter upon the periphery of the cam disc 13, whereby the-guiding and lconsequently the moving of the entire driving mechanism is positively controlled.

The line 17 in Figures 3 and t shows the course of the movement of the rod 9, and the line 18 shows the action upon the movement of the lever 10. From b to c the roller carraige 4 is stationary in front of the inking roller 19, from c to al is effected the gradual .establishment of the downward movement to e, from e' to b the upward movement, which however is retarded from w to Z) until it gradually becomes stationary. During the stoppage the slide block 11 slides positively to and fro in the slot 12 in the connecting rod 9. By the slide block 11 in conjunction with the positively determined guidance of the rollers 15 and 16 upon the edge 14 of the double cam disc 13, the lever 10 is locked in any position, and the entire operation proceeds smoothly and without shock, even at high speedsl of revolution of the machine.

l/Vhat I claim is:

1. A platen printing press, comprising a roller carriage, arms for raising and lowering said roller carriage, a disc crank, a crank pin o-n said disc crank, a connecting rod slotted at its outer end, a slide block mounted on said crank pin and adapted to slide in on the connecting rod and adapted to run on the edges of said double cam.

2. A platen printing press, comprising a roller carriage, arms for raising and lowering said roller carriage, a disc crank, a crank pin on said disc crank, a connecting rod slotted at its outer end, a slide block mounted on said crank pin and adapted to slide in the slot, said crank and connecting rod being adapted to drive said arms, a double cam fixed to the dise crank and surrounding the crank pin, and antifriotion rollers mounted on the connecting rod and adapted to run on the edges of said double cam, the double cam being so shaped that the movement and the stoppage of the roller carriage occur gradually.

3. A platen printing press, comprising a roller carriage, a shaft, arms secured to said shaft for raising and lowering said roller carriage, a spring coiled round said shaft for counterbalancing the Weight of said roller carriage, a disc crank, a crank pin on said disk crank, a connecting rod slotted at its outer end, a slide block mounted on said crank pin and adapted to slide in the slot, said crank and connecting rod being adapted to drive said arms, a double Cam fixed to the disk crank and surrounding the crank pin, and anti-friction rollers mounted on the conmeeting,` rod and adapted to run on the edges of said double cam.

In testimony whereof I affix my signature.

MAX HORA. 

